Automobile seat ventilation controller

Abstract

The utility model relates to the technical field of automobile seat ventilation control, and discloses an automobile seat ventilation controller which comprises a power supply unit, a main control unit, a fan driving unit, a CAN communication unit, an infrared detection unit, a rotary dial switch and a change-over switch. In actual use, the infrared detection unit is used for detecting the body surface temperature of a person on the seat, so that the rotating speed of the fan can be adjusted through the fan driving unit according to the detected body surface temperature, air supply at different speeds is achieved, heat is quickly dissipated by increasing the air supply amount when the body surface temperature is high, and manual operation is not needed.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat ventilation control technology, specifically to an automotive seat ventilation controller. Background Technology

[0002] Currently, when a car is exposed to direct sunlight or in high summer temperatures, the surface temperature of leather seats can reach over 60°C. Even with the air conditioning on, the surface of the seat in contact with the body can still create localized high-temperature zones due to sweating, affecting the driving experience. Similarly, in cold winters, car seats with low surface temperatures also negatively impact the driving experience. Therefore, existing car seats have incorporated seat ventilation functions, blowing air onto the body to dissipate heat effectively.

[0003] Existing car seat ventilation systems mostly rely on the car's central control screen for ventilation control, and can only adjust the wind speed in units, not automatically adjust the airflow based on the driver's body temperature, making operation inconvenient. Utility Model Content

[0004] In view of the shortcomings of the background technology, the present invention provides a car seat ventilation controller. The technical problem to be solved is that most existing car seat ventilation controllers rely on the central control screen of the car to control the wind speed, and cannot automatically deliver air according to the driver's body temperature, which is inconvenient to operate.

[0005] To solve the above technical problems, this utility model provides the following technical solution: an automotive seat ventilation controller, including a power supply unit, a main control unit, a fan drive unit, a CAN communication unit, an infrared detection unit, a rotary DIP switch, and a switching switch;

[0006] The power supply unit is electrically connected to the main control unit, the fan drive unit, the CAN communication unit and the infrared detection unit respectively, and is used to convert the external power supply voltage input to itself into the working voltage of the main control unit, the fan drive unit, the CAN communication unit and the infrared detection unit.

[0007] The main control unit is electrically connected to the fan drive unit, the CAN communication unit and the infrared detection unit respectively. It controls the fan speed through the fan drive unit, interacts with the car's central control through the CAN communication unit, and detects the driver's body surface temperature through the infrared detection unit.

[0008] The rotary DIP switch is electrically connected to the main control unit and is used to manually set the fan speed.

[0009] The switching switch is electrically connected to the main control unit and inputs a switching signal to the main control unit. The switching signal is used for automatic control of seat ventilation.

[0010] In one embodiment, the power supply unit includes a Zener diode ZD1, a diode D1, a fuse F1, a capacitor C1, a capacitor C2, and a Zener chip U1;

[0011] The cathode of the Zener diode ZD1 is electrically connected to the anode of the diode D1 for inputting external power supply voltage. The anode of the Zener diode ZD1 is grounded. The cathode of the diode D1 is electrically connected to one end of the fuse F1. The other end of the fuse F1 is electrically connected to the power supply pin of the voltage regulator chip U1 and grounded through capacitor C1. The operating voltage output pin of the voltage regulator chip U1 is grounded through capacitor C2.

[0012] In one embodiment, the voltage regulator chip U1 is model ME1117, pin 3 of the voltage regulator chip U1 is the power supply pin, pins 2 and 4 of the voltage regulator chip U1 are the working voltage output pins, and pin 1 of the voltage regulator chip U1 is grounded.

[0013] In one implementation, the main control unit includes a microcontroller of model STM32F030F4P6.

[0014] In one embodiment, the fan drive unit includes a transistor Q1. The emitter of transistor Q1 is electrically connected to one end of resistor R13 for inputting the operating voltage. The base of transistor Q1 is electrically connected to the other end of resistor R13 and one end of resistor R12. The collector of transistor Q1 is electrically connected to one end of resistor R14, one end of capacitor C10, and the gate of MOSFET M10. The other ends of resistor R14 and capacitor C10 are both grounded. The drain of MOSFET M10 is used to input the external power supply voltage.

[0015] The other end of resistor R12 is electrically connected to the collector of transistor Q2. The base of transistor Q2 is electrically connected to one end of resistor R10 and one end of resistor R11, respectively. The other end of resistor R10 is electrically connected to the main control unit. The other end of resistor R11 and the emitter of transistor Q2 are both grounded.

[0016] In one embodiment, the MOS transistor M10 is an NMOS transistor.

[0017] In one embodiment, the source of the MOS transistor M10 is electrically connected to a sampling resistor, and the two ends of the sampling resistor are electrically connected to the main control unit.

[0018] In one embodiment, the infrared detection unit includes an infrared sensor of model RE200B.

[0019] In one embodiment, the rotary dial switch is a six-position rotary dial switch.

[0020] In one embodiment, the present invention further includes a Bluetooth communication unit, a temperature detection unit, and a heating unit. The main control unit is electrically connected to the Bluetooth communication unit, the temperature detection unit, and the heating unit, respectively. The temperature detection unit detects the temperature of the air blown out by the fan, and the heating unit heats the air blown out by the fan.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: In actual use, this utility model detects the body surface temperature of the person in the seat through an infrared detection unit, and then adjusts the fan speed through the fan drive unit according to the detected body surface temperature, thereby realizing air delivery at different speeds. When the body surface temperature is high, the air delivery volume is increased to quickly dissipate heat without manual operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention in the embodiments;

[0023] Figure 2 This is a circuit diagram of the power supply unit in the embodiment;

[0024] Figure 3 This is a circuit diagram of the fan drive unit in the embodiment. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] like Figure 1 As shown in the figure, the automotive seat ventilation controller provided in this embodiment includes a power supply unit 1, a main control unit 2, a fan drive unit 3, a CAN communication unit 4, an infrared detection unit 5, a rotary DIP switch 6, and a switching switch 7.

[0027] The connection relationships of power supply unit 1, main control unit 2, fan drive unit 3, CAN communication unit 4, infrared detection unit 5, rotary DIP switch 6, and changeover switch 7 are as follows:

[0028] Power supply unit 1 is electrically connected to main control unit 2, fan drive unit 3, CAN communication unit 4 and infrared detection unit 5 respectively, and is used to convert the external power supply voltage input to itself into the working voltage of main control unit 2, fan drive unit 3, CAN communication unit 4 and infrared detection unit 5.

[0029] The main control unit 2 is electrically connected to the fan drive unit 3, the CAN communication unit 4 and the infrared detection unit 5 respectively. It controls the fan speed through the fan drive unit 3, interacts with the car's central control through the CAN communication unit 4, and detects the driver's body surface temperature through the infrared detection unit 5.

[0030] The rotary DIP switch 6 is electrically connected to the main control unit 3 and is used to manually set the fan speed.

[0031] The switch 7 is electrically connected to the main control unit 2 and inputs a switching signal to the main control unit 2. The switching signal is used for automatic control of seat ventilation.

[0032] In actual use, by operating the switch 7, you can set whether the seat ventilation is automatic or manual. When it is manual ventilation, the wind speed is set by rotating the DIP switch 6. In other words, this utility model is also compatible with the original manual ventilation.

[0033] When automatic ventilation is activated, this invention uses an infrared detection unit 5 to detect the body surface temperature of the person in the seat. Based on the detected body surface temperature, the fan drive unit 3 can adjust the fan speed to achieve different speeds of air delivery. When the body surface temperature is high, the air delivery volume is increased to quickly dissipate heat without manual operation.

[0034] Specifically, in this embodiment, as Figure 2 As shown, power supply unit 1 includes Zener diode ZD1, diode D1, fuse F1, capacitor C1, capacitor C2 and voltage regulator chip U1;

[0035] The cathode of Zener diode ZD1 is electrically connected to the anode of diode D1 to input the external power supply voltage VIN. The anode of Zener diode ZD1 is grounded. The cathode of diode D1 is electrically connected to one end of fuse F1. The other end of fuse F1 is electrically connected to the power supply pin of voltage regulator chip U1 and grounded through capacitor C1. The operating voltage output pin of voltage regulator chip U1 is grounded through capacitor C2.

[0036] More specifically, in this embodiment, the voltage regulator chip U1 is model ME1117. Pin 3 of the voltage regulator chip U1 is the power supply pin, pins 2 and 4 are the operating voltage output pins, and pin 1 of the voltage regulator chip U1 is grounded. In some implementations, other models of voltage regulator chips U1 can be selected according to actual needs.

[0037] In this embodiment, the main control unit 2 includes an STM32F030F4P6 microcontroller. In some implementations, the main control unit 2 may also be selected from other microcontroller models or other control chips with computing functions, depending on actual needs.

[0038] In this embodiment, as Figure 3 As shown, the fan drive unit 3 includes a transistor Q1. The emitter of transistor Q1 is electrically connected to one end of resistor R13 for inputting the working voltage VCC. The base of transistor Q1 is electrically connected to the other end of resistor R13 and one end of resistor R12. The collector of transistor Q1 is electrically connected to one end of resistor R14, one end of capacitor C10 and the gate of MOSFET M10. The other ends of resistor R14 and capacitor C10 are both grounded. The drain of MOSFET M10 is used to input the external power supply voltage VIN.

[0039] The other end of resistor R12 is electrically connected to the collector of transistor Q2. The base of transistor Q2 is electrically connected to one end of resistor R10 and one end of resistor R11, respectively. The other end of resistor R10 is electrically connected to the main control unit. The other end of resistor R11 and the emitter of transistor Q2 are both grounded. In addition, MOSFET M10 is an NMOS transistor.

[0040] In actual use, the main control unit 2 controls the collector output of the transistor Q1 by controlling the on and off of the transistor Q2. The PWM signal is used to control the on and off of the MOSFET M10. The higher the duty cycle of the high-level interval in the PWM signal, the higher the speed of the fan connected to the fan drive unit 3.

[0041] In addition, Figure 3 In the circuit, the source of MOSFET M10 is electrically connected to a sampling resistor R15, and the two ends of the sampling resistor R15 are electrically connected to the main control unit 2.

[0042] In actual use, the main control unit 2 can determine whether there is an overcurrent in the current flowing through the fan by using the voltage on resistor R15. If there is an overcurrent, it can turn off MOSFET M10 in time to avoid abnormal situations.

[0043] Specifically, in this embodiment, the infrared detection unit 5 includes an infrared sensor of model RE200B. In some implementations, other models of infrared sensors can be selected according to actual needs.

[0044] Specifically, in this embodiment, the rotary dial switch 6 is a six-position rotary dial switch.

[0045] Specifically, in this embodiment, in Figure 1 In addition, the present invention also includes a Bluetooth communication unit 8, a temperature detection unit 9 and a heating unit 10. The main control unit 2 is electrically connected to the Bluetooth communication unit 8, the temperature detection unit 9 and the heating unit 10 respectively. The temperature detection unit 9 detects the temperature of the air blown out by the fan, and the heating unit 10 heats the air blown out by the fan.

[0046] In actual use, the air conditioning system can cool down quickly and blow out cold air quickly. However, in the cold winter, the seats need to blow out hot air. At this time, the car's air conditioning system generates heat slowly. Based on this, the main control unit 2 can heat the air blown out by the fan through the heating unit 2 to blow out hot air, and the temperature detection unit 9 can detect the temperature of the air to achieve negative feedback heating.

[0047] Based on the above description and inspired by this utility model, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A car seat ventilation controller, characterized in that, It includes a power supply unit, a main control unit, a fan drive unit, a CAN communication unit, an infrared detection unit, a rotary DIP switch, and a changeover switch; The power supply unit is electrically connected to the main control unit, the fan drive unit, the CAN communication unit and the infrared detection unit respectively, and is used to convert the external power supply voltage input to itself into the working voltage of the main control unit, the fan drive unit, the CAN communication unit and the infrared detection unit. The main control unit is electrically connected to the fan drive unit, the CAN communication unit and the infrared detection unit respectively. It controls the fan speed through the fan drive unit, interacts with the car's central control through the CAN communication unit, and detects the driver's body surface temperature through the infrared detection unit. The rotary DIP switch is electrically connected to the main control unit and is used to manually set the fan speed. The switching switch is electrically connected to the main control unit and inputs a switching signal to the main control unit. The switching signal is used for automatic control of seat ventilation.

2. The automotive seat ventilation controller according to claim 1, characterized in that, The power supply unit includes a Zener diode ZD1, a diode D1, a fuse F1, a capacitor C1, a capacitor C2, and a Zener chip U1. The cathode of the Zener diode ZD1 is electrically connected to the anode of the diode D1 for inputting external power supply voltage. The anode of the Zener diode ZD1 is grounded. The cathode of the diode D1 is electrically connected to one end of the fuse F1. The other end of the fuse F1 is electrically connected to the power supply pin of the voltage regulator chip U1 and grounded through capacitor C1. The operating voltage output pin of the voltage regulator chip U1 is grounded through capacitor C2.

3. A car seat ventilation controller according to claim 2, characterized in that, The voltage regulator chip U1 is model ME1117. Pin 3 of the voltage regulator chip U1 is the power supply pin, pins 2 and 4 of the voltage regulator chip U1 are the working voltage output pins, and pin 1 of the voltage regulator chip U1 is grounded.

4. A car seat ventilation controller according to claim 1, characterized in that, The main control unit includes a microcontroller of model STM32F030F4P6.

5. A car seat ventilation controller according to claim 1, characterized in that, The fan drive unit includes a transistor Q1. The emitter of transistor Q1 is electrically connected to one end of resistor R13 for inputting the operating voltage. The base of transistor Q1 is electrically connected to the other end of resistor R13 and one end of resistor R12. The collector of transistor Q1 is electrically connected to one end of resistor R14, one end of capacitor C10, and the gate of MOSFET M10. The other ends of resistor R14 and capacitor C10 are both grounded. The drain of MOSFET M10 is used to input the external power supply voltage. The other end of resistor R12 is electrically connected to the collector of transistor Q2. The base of transistor Q2 is electrically connected to one end of resistor R10 and one end of resistor R11, respectively. The other end of resistor R10 is electrically connected to the main control unit. The other end of resistor R11 and the emitter of transistor Q2 are both grounded.

6. A car seat ventilation controller according to claim 5, characterized in that, The MOS transistor M10 is an NMOS transistor.

7. A car seat ventilation controller according to claim 6, characterized in that, The source of the MOS transistor M10 is electrically connected to a sampling resistor, and the two ends of the sampling resistor are electrically connected to the main control unit.

8. A car seat ventilation controller according to claim 1, characterized in that, The infrared detection unit includes an infrared sensor of model RE200B.

9. A car seat ventilation controller according to claim 1, characterized in that, The rotary dial switch is a six-position rotary dial switch.

10. A car seat ventilation controller according to claim 1, characterized in that, It also includes a Bluetooth communication unit, a temperature detection unit, and a heating unit. The main control unit is electrically connected to the Bluetooth communication unit, the temperature detection unit, and the heating unit, respectively. The temperature detection unit detects the temperature of the air blown out by the fan, and the heating unit heats the air blown out by the fan.

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